A Monograph of the Freshwater Polyzoa, Including All the Known Species, Both British and Foreign |
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Página 7
Retractor muscle. Let us imagine an alimentary canal, consisting of oesophagus,
stomach, and intestine, to be furnished at its origin with long ciliated tentacula,
and to have a single nervous ganglion situated on one side of the oesophagus.
Retractor muscle. Let us imagine an alimentary canal, consisting of oesophagus,
stomach, and intestine, to be furnished at its origin with long ciliated tentacula,
and to have a single nervous ganglion situated on one side of the oesophagus.
Página 20
Ganglion. m. Generative organ. n. Retractor muscle. o. Lophophore. The
tentacula are connected to one another at their base by a membrane which
adheres to their back, extending forwards for about one third of their length, and
constituting a ...
Ganglion. m. Generative organ. n. Retractor muscle. o. Lophophore. The
tentacula are connected to one another at their base by a membrane which
adheres to their back, extending forwards for about one third of their length, and
constituting a ...
Página 21
The retractor fibres are obviously homologous with the great retractor muscles of
the others. The mouth, which occupies its normal position in the body of the
lophophore, opens into an opsophagus, which after a short course terminates in
the ...
The retractor fibres are obviously homologous with the great retractor muscles of
the others. The mouth, which occupies its normal position in the body of the
lophophore, opens into an opsophagus, which after a short course terminates in
the ...
Página 24
Retractor Muscles of the Polypide. These, which are the largest and most
powerful muscles of the animal, consist of two fasciculi (Pl. IV, fig. 4; V, fig. 5; IX,
fig. 7, n), which arise far back from the inner surface of the endocyst, and thence
pass ...
Retractor Muscles of the Polypide. These, which are the largest and most
powerful muscles of the animal, consist of two fasciculi (Pl. IV, fig. 4; V, fig. 5; IX,
fig. 7, n), which arise far back from the inner surface of the endocyst, and thence
pass ...
Página 26
... muscularity; but they do not always present the appearance of distinct fibrous
fascicles, and I have been unable to detect in them the striae, or see them
breaking into the discs, which may be observed in the great retractors of the
polypide.
... muscularity; but they do not always present the appearance of distinct fibrous
fascicles, and I have been unable to detect in them the striae, or see them
breaking into the discs, which may be observed in the great retractors of the
polypide.
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A Monograph of the Fresh-water Polyzoa: Including All the Known ..., Volumen28 George James Allman Vista de fragmentos - 1856 |
A Monograph of the Fresh-water Polyzoa: Including All the Known Species ... George James Allman Vista de fragmentos - 1856 |
Términos y frases comunes
adherent admit Alcyonella alimentary alimentary canal Allman already anatomy animal appearance attached become Beneden bodies branches branchial British canal cavity cell characters cilia closely coenoecium complete condition connected consists constitutes contained continuous Cristatella crown described detected disc distinct Dumortier ectocyst edit endocyst entire epistome examined existence extending external extremity fibres fluid Fredericella fresh-water Polyzoa genera genus Gervais gives Hist important internal latter layer Leidy lophophore Lophopus margin mass Mém membrane memoir minute mouth muscles Natural naturalists nearly observed occur organ orifice Original figures Paludicella passes Plumatella Plumatella repens Polype polypide Polyzoon portion present published relations repens resemblance retraction retractor seen separated sheath side space species specimens statoblasts stomach stones structure surface surrounding tentacula transparent transverse Trembley true tubes Tubularia tunic Tunicata walls whole young
Información bibliográfica
| Título | A Monograph of the Freshwater Polyzoa, Including All the Known Species, Both British and Foreign Volumen18 de ¬The Ray Society |
| Autor | George James Allman |
| Editor | Ray Society, 1856 |
| Procedencia del original | la Biblioteca Estatal de Baviera |
| Digitalizado | 13 Nov. 2009 |
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